Evaluation of mucosal surface reduction after ethmoidal surgery in nasal polyposis

2007 ◽  
Vol 121 (7) ◽  
pp. 1-4 ◽  
Author(s):  
P Bonfils ◽  
P Avan ◽  
P Palimi ◽  
D Malinvaud
Keyword(s):  
Computed Tomography ◽  
Maxillary Antrum ◽  
Lateral Wall ◽  
Ethmoid Sinus ◽  
Mucosal Surface ◽  
Sinus Wall ◽  
Lateral Ethmoid ◽  
The Mean ◽  
Upper Level ◽  
Ethmoid Sinuses

Objectives: To assess the reduction of mucosal surface after total sphenoethmoidectomy.Study design: Prospective study.Methods: Twelve normal, consecutive computed tomography scans were used. Computed tomography measurements were made at two different levels: the cribriform plate, and the upper level of the maxillary antrum. The length of the lateral wall of the ethmoid sinus and the perimeter of each ethmoid cell were measured at each level and on each side. The whole perimeter of the ethmoid sinus was evaluated for each CT scan level. For each side and each level, the ratio between the ethmoid sinus perimeter and the lateral ethmoid wall length was calculated.Results: The mean length of the lateral ethmoid sinus wall was 61.7±1.3 mm and 59.9±1.6 mm at the upper and lower parts of the ethmoid sinus, respectively. The mean ethmoid sinus perimeter was 263.2±11.5 mm and 250.4±11.1 mm at the upper and lower parts of the ethmoid sinus, respectively. No significant statistical difference was observed between measurements as a function of side (right or left) or level (upper or lower). The mean ratio between the ethmoid sinus perimeter and the lateral ethmoid wall length was 4.2.Conclusion: After total sphenoethmoidectomy, the mucosal surface of the ethmoid sinuses is reduced by a factor of 4.2; about 76 per cent of the mucosa is removed during total sphenoethmoidectomy.

scholarly journals Ethnic variation in medial orbital wall anatomy and its implications for decompression surgery

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Minhui Amy Chan ◽  
Farah Ibrahim ◽  
Arjunan Kumaran ◽  
Kailing Yong ◽  
Anita Sook Yee Chan ◽  
...  
Keyword(s):  
Relative Position ◽  
Ethmoid Sinus ◽  
Decompression Surgery ◽  
Ethnic Variation ◽  
Sinus Wall ◽  
Orbital Wall ◽  
Mean Width ◽  
Significant Difference ◽  
The Mean ◽  
Medial Orbital Wall

Abstract Background To describe the inter-ethnic variation in medial orbital wall anatomy between Chinese, Malay, Indian and Caucasian subjects. Methods Single-centre, retrospective, Computed Tomography (CT)-based observational study. 20 subjects of each ethnicity, were matched for gender and laterality. We excluded subjects younger than 16 years and those with orbital pathology. OsiriX version 8.5.1 (Pixmeo., Switzerland) and DICOM image viewing software CARESTREAM Vue PACS (Carestream Health Inc., USA) were used to measure the ethmoidal sinus length, width and volume, medial orbital wall and floor angle and the relative position of the posterior ethmoid sinus to the posterior maxillary wall. Statistical analyses were performed using Statistical Package for Social Sciences version 25.0 (IBM, USA). Results There were 12 males (60 %) in each group, with no significant difference in age (p = 0.334–0.994). The mean ethmoid sinus length in Chinese, Malay, Indian and Caucasian subjects, using the Chinese as reference, were 37.2, 36.9, 38.0 and 37.4mm, the mean width was 11.6, 10.5, 11.4 and 10.0mm (p = 0.020) and the mean ethmoid sinus volume were 3362, 3652, 3349 and 3898mm3 respectively. The mean medial orbital wall and floor angle was 135.0, 131.4, 131.0 and 136.8 degrees and the mean relative position of posterior ethmoid sinus to posterior maxillary wall were − 2.0, -0.2, -1.5 and 1.6mm (p = 0.003) respectively. Conclusions No inter-ethnic variation was found in decompressible ethmoid sinus volume. Caucasians had their posterior maxillary sinus wall anterior to their posterior ethmoidal walls unlike the Chinese, Malay and Indians. Awareness of ethnic variation is essential for safe orbital decompression.

scholarly journals 3D Volumetric Analysis and Anatomical Considerations for Sinus Bone Graft

2021 ◽  
Vol 11 (3) ◽  
pp. 951
Author(s):  
Ji Hyoung Kim ◽  
Hyo Joon Kim ◽  
Ye Joon Jo ◽  
Jun Seok Choi ◽  
Seong Yong Moon
Keyword(s):  
Bone Graft ◽  
Maxillary Sinus ◽  
Alveolar Bone ◽  
Lateral Wall ◽  
Volumetric Analysis ◽  
Ct Scans ◽  
Sinus Floor Elevation ◽  
Sinus Wall ◽  
Sinus Floor ◽  
The Mean

The aim of this study is to evaluate anatomical considerations and assess the volume of the maxillary sinus bone graft. There were sixty-three patients (eighty-three sinuses) who had taken CT scans for implant surgery. Patients included those whose height of the residual alveolar bone was less than 5 mm. The position of posterior superior alveolar artery, the thickness of the maxillary sinus wall, and the volume of the maxillary sinus according to the amount of sinus floor elevation were measured. The mean vertical distance of posterior superior alveolar artery was 11.91 ± 4.79 mm from 3.03 mm to 24.05 mm. The mean thickness of the lateral wall was 1.71 ± 0.55 mm in the range of 0.74 mm to 3.93 mm. The volume of 3 mm, 5 mm, 7 mm, and 10 mm from the sinus floor was 0.173 ± 0.11 cm3, 0.526 ± 0.25 cm3, 1.068 ± 0.43 cm3, and 2.184 ± 0.74 cm3 on average, respectively. The knowledge of the posterior superior alveolar artery position, the lateral wall thickness, and the volume of the maxillary sinus can help the clinician for sinus bone graft.

scholarly journals Surgical Approach to Frontal and Ethmoid Sinus Osteomas: The Experience of 2 Metropolitan Italian Hospitals

2021 ◽  
pp. 014556132110168
Author(s):  
Antonio Minni ◽  
Luca Roncoroni ◽  
Fabrizio Cialente ◽  
Federica Zoccali ◽  
Andrea Colizza ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Surgical Approach ◽  
Cerebrospinal Fluid Leak ◽  
Ethmoid Sinus ◽  
Endoscopic Approach ◽  
Open Approach ◽  
The Mean ◽  
Ethmoid Sinuses ◽  
Fluid Leak

Objectives: The aim of this study was to report the surgical management experience of patients with osteomas of the frontal and ethmoid sinuses performed in 2 metropolitan Italian hospitals between 2012 and 2019. Methods: A retrospective chart review of cases of frontal and ethmoid osteomas from the Ca’ Granda Niguarda Hospital of Milan and the Policlinico Umberto I University Hospital of Rome was performed. All patients underwent preoperative computed tomography and, when orbital or intracranial extension was suspected, magnetic resonance imaging. Surgical treatment was performed according to Chiu classification. Results: A total of 38 cases of frontal and ethmoid sinus osteomas were included in the study; 22 patients were men and 16 were women. The mean age at diagnosis was 49 years. Seven (18.4%) patients were treated using an open approach; 3 (7.9%) patients underwent open and endoscopic approach; the remaining 28 (73.7%) patients were treated with endoscopic approach. Seven (18.4%) patients had a cerebrospinal fluid leak intraoperatively and were treated with the placement of tissue graft through the defect. The mean follow-up time was 18 months; no recurrence was observed at 12-month follow-up. Conclusion: Osteomas of the frontal and ethmoid sinuses can be treated using different techniques, mostly endoscopically. The choice of surgical approach (endoscopic vs open) depends on the location and size of the osteoma, anatomical size, characteristic of the sinus, surgeon’s experience, and available existing technical facilities. Cerebrospinal fluid leak is a possible complication of surgery.

Fibrosarcoma of the ethmoid

1989 ◽  
Vol 103 (7) ◽  
pp. 686-689 ◽  
Author(s):  
Michaei C. F. Smith ◽  
James V. Soames
Keyword(s):  
Maxillary Antrum ◽  
Ethmoid Sinus ◽  
Local Resection ◽  
Treatment Modalities ◽  
Primary Neoplasm ◽  
Well Differentiated ◽  
Ethmoid Sinuses

AbstractFibrosarcoma may involve the ethmoid sinus by extension from the maxillary antrum or, more rarely arise as a primary neoplasm.A case of a well differentiated primary fibrosarcoma of the ethmoid sinuses is reported which presented in a 24-year-old male. The tumour was treated by wide local resection. From a review of similar cases in the literature together with their treatment modalities and outcome. It is concluded that wide local resection is the treatment of choice.

Evaluation of the Posterior Superior Alveolar Artery Prior to Sinus Floor Elevation via Lateral Window Technique: A Cone-Beam Computed Tomography Study

2020 ◽  
Vol 11 (2) ◽  
pp. 215-223
Author(s):  
Elçin Bedelog˘lu ◽  
Mustafa Yalçın
Keyword(s):  
Computed Tomography ◽  
Maxillary Sinus ◽  
Cone Beam Computed Tomography ◽  
Lateral Wall ◽  
Cone Beam ◽  
Sinus Floor Elevation ◽  
Mean Values ◽  
Detection Point ◽  
Sinus Floor ◽  
The Mean

Aim: To evaluate the prevalence, diameter, localization of the posterior superior alveolar artery (PSAA) and the relationship between PSAA and the floor of the maxillary sinus and the thickness of the maxillary sinus lateral wall using cone-beam computed tomography (CBCT). Material and Methods: In this retrospective study, more than 500 CBCT images were retrieved. Out of them 156 CBCT images were related to the sinus floor elevation, among which 120 CBCT images were enrolled in the study based on the inclusion criteria, and 36 CBCT images were excluded. A total of 120 CBCT images of the PSSA from 60 patients comprising 32 (53.3%) men and 28 (46.7%) women were analyzed. Statistical data were analyzed using SPSS for Windows version 22. Descriptive statistics (mean, standard deviation, frequency) were used for the analyses. Results: The ages of the participants ranged between 26 and 76 years and the mean age was 54.48 ± 10.92 years. The PSAA was detected on the right side in 95% of the CBCT scans and on the left side in 85% of the maxillary sinuses. At the first detection point (FDP) and last detection point (LDP), the mean values of the distance between the inferior border of the PSAA and the floor of the maxillary sinus were 9.54 ± 4.27 mm and 7.91 ± 4.75 mm, respectively. The mean diameters of the PSAA at the FDP and LDP were 1.36 ± 0.46 mm and 1.12 ± 0.35 mm, respectively. Conclusion: Detection of the characteristics of the PSAA by using CBCT is crucial for handling the sinus floor elevation procedures uneventfully.

Abnormalities of the paranasal sinuses in patients with nasopharyngeal carcinoma: a computed tomographic study

1996 ◽  
Vol 110 (1) ◽  
pp. 23-26 ◽  
Author(s):  
M. J. Porter ◽  
H. S. Cheung ◽  
R. Ambrose ◽  
S. F. Leung ◽  
C. A. van Hasselt
Keyword(s):  
Computed Tomography ◽  
Hong Kong ◽  
Retrospective Study ◽  
Nasopharyngeal Carcinoma ◽  
Paranasal Sinuses ◽  
Ethmoid Sinus ◽  
Control Group ◽  
Computed Tomographic ◽  
Computed Tomography Scans ◽  
Ethmoid Sinuses

AbstractA retrospective study of computed tomography scans of the paranasal sinuses of 131 control subjects in Hong Kong revealed minor mucosal abnormalities in more than half of the ethmoid sinuses. Major abnormalities were present in seven per cent of maxillary, five per cent of anterior ethmoid and four per cent of posterior ethmoid sinus. In 85 patients with nasopharyngeal carcinoma the prevalence of minor mucosal abnormalities in the sinuses was similar to that of the control group but major mucosal abnormalities were significantly more common in the anterior and posterior ethmoids at 15 per cent and 21 per cent of the respective sinuses (p<0.001).

B-Mode ultrasonography of the paranasal sinuses compared with CT findings

1992 ◽  
Vol 107 (6_part_1) ◽  
pp. 713-720 ◽  
Author(s):  
Gerard J. Gianoli ◽  
Wolfgang J. Mann ◽  
Robert H. Miller
Keyword(s):  
Computed Tomography ◽  
Maxillary Sinus ◽  
Gold Standard ◽  
English Language ◽  
Prospective Trial ◽  
Ethmoid Sinus ◽  
English Language Literature ◽  
Ethmoid Sinuses ◽  
Retention Cysts ◽  
Language Literature

Ultrasound as a diagnostic aid In the evaluation of the sinuses has been a controversial Issue. Sensitivities have been reported from 29% to 100% and specificities from 55% to 99%. These wide variations in results from previous studies may have resulted from technical differences. However, the “gold standard” most often used for comparison has been a Water's view radiograph, which has been shown to correlate poorly with intraoperative and CT scan findings. To our knowledge, no one In the English language literature has evaluated sonography of the sinuses with computed tomography as the gold standard. In addition, evaluation of the ethmoid sinus has been neglected by previous studies that have primarily assessed the maxillary sinus. We report the results of a blinded, prospective trial comprised of 41 patients examined by B-mode ultrasound with comparison to computed tomography. Frontal and maxillary sinuses were examined with traditional sonographic techniques and the ethmoid sinuses were scanned with a transglobe technique not previously evaluated in the English language literature. Excluding Isolated mucous retention cysts and focal minimal mucosal thickening (defined as <4 mm), sensitivities for ultrasound of the maxillary, frontal, and ethmoid sinuses were 100% each. Specificities were 98% for the maxillary sinus, 100% for the frontal sinus, and 94% for the ethmoid sinus. Technical aspects and implications of this and previous reports will be discussed.

scholarly journals Cone-beam computed tomography characterization of the intraosseous vascular canal in the lateral wall of the maxillary antrum

2021 ◽  
Vol 47 (1) ◽  
pp. 34-39
Author(s):  
Shishir Ram Shetty ◽  
Saad Wahby Al Bayatti ◽  
Hesham Marei ◽  
Raghavendra Shetty ◽  
Hossam Abdelatty Abdelmagyd ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Maxillary Antrum ◽  
Lateral Wall ◽  
Cone Beam ◽  
Vascular Canal

Computed Tomography-Based Patient-Specific Instrumentation Loses Accuracy with Significant Varus Preoperative Misalignment

2020 ◽  
Author(s):  
Vicente Jesús León-Muñoz ◽  
Mirian López-López ◽  
Alonso José Lisón-Almagro ◽  
Francisco Martínez-Martínez ◽  
Fernando Santonja-Medina
Keyword(s):  
Computed Tomography ◽  
Deformity Correction ◽  
Patient Specific ◽  
Control Group ◽  
X Rays ◽  
Varus Alignment ◽  
Patient Specific Instrumentation ◽  
Conventional Instrumentation ◽  
The Mean ◽  
Valgus Alignment

AbstractPatient-specific instrumentation (PSI) has been introduced to simplify and make total knee arthroplasty (TKA) surgery more precise, effective, and efficient. We performed this study to determine whether the postoperative coronal alignment is related to preoperative deformity when computed tomography (CT)-based PSI is used for TKA surgery, and how the PSI approach compares with deformity correction obtained with conventional instrumentation. We analyzed pre-and post-operative full length standing hip-knee-ankle (HKA) X-rays of the lower limb in both groups using a convention > 180 degrees for valgus alignment and < 180 degrees for varus alignment. For the PSI group, the mean (± SD) pre-operative HKA angle was 172.09 degrees varus (± 6.69 degrees) with a maximum varus alignment of 21.5 degrees (HKA 158.5) and a maximum valgus alignment of 14.0 degrees. The mean post-operative HKA was 179.43 degrees varus (± 2.32 degrees) with a maximum varus alignment of seven degrees and a maximum valgus alignment of six degrees. There has been a weak correlation among the values of the pre- and postoperative HKA angle. The adjusted odds ratio (aOR) of postoperative alignment outside the range of 180 ± 3 degrees was significantly higher with a preoperative varus misalignment of 15 degrees or more (aOR: 4.18; 95% confidence interval: 1.35–12.96; p = 0.013). In the control group (conventional instrumentation), this loss of accuracy occurs with preoperative misalignment of 10 degrees. Preoperative misalignment below 15 degrees appears to present minimal influence on postoperative alignment when a CT-based PSI system is used. The CT-based PSI tends to lose accuracy with preoperative varus misalignment over 15 degrees.

Sign in / Sign up

Export Citation Format

Share Document